Subject: [PATCH v2] MdePkg/DxeHstiLib: Added checks to improve error handling.

[<Jayanth.Raghuram@dell.com>]

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Hi Liming,
per your recommendation,

Please review the below [PATCH v2] and the commit can be found in: git@github.com:JayRaghuram/edk2.git<mailto:git@github.com:JayRaghuram/edk2.git> (https://github.com/JayRaghuram/edk2)
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2138
________________________________
>From 95c48454d6d14cb7537dec98d58f7dc01efa644e Mon Sep 17 00:00:00 2001
Message-Id: <95c48454d6d14cb7537dec98d58f7dc01efa644e.1567095734.git.Jayanth_Raghuram@Dell.com>
From: Jayanth Raghuram <Jayanth_Raghuram@Dell.com>
Date: Thu, 29 Aug 2019 11:17:09 -0500
Subject: [PATCH v2] MdePkg/DxeHstiLib: Added checks to improve error handling.

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2138

Added checks for return parameters of GetSupportedTypes
function calls in InternalHstiFindAip to improve error handling.
An issue was observed on Dell Poweredge R740, where the Dell
PERC H740P controller UEFI driver returned InfoTypesBuffer = NULL,
InfoTypesBufferCount = 0 and caused an FreePool assert.

Signed-off-by: Jayanth Raghuram <Jayanth.Raghuram@Dell.com>
Cc: Wei G Liu <Wei_G_Liu@Dell.com>
---
MdePkg/Library/DxeHstiLib/HstiDxe.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MdePkg/Library/DxeHstiLib/HstiDxe.c b/MdePkg/Library/DxeHstiLib/HstiDxe.c
index 9466e3dcb3..4e1c67616b 100644
--- a/MdePkg/Library/DxeHstiLib/HstiDxe.c
+++ b/MdePkg/Library/DxeHstiLib/HstiDxe.c
@@ -77,7 +77,7 @@ InternalHstiFindAip (
                     &InfoTypesBuffer,
                     &InfoTypesBufferCount
                     );
-    if (EFI_ERROR (Status)) {
+    if (EFI_ERROR (Status) || (InfoTypesBuffer == NULL) || (InfoTypesBufferCount == 0)) {
       continue;
     }
--
2.19.1.windows.1
________________________________

Regards
Jayanth Raghuram
DellEMC | Server Platform BIOS
office + 1 512 723 1470


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